diff --git a/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/DefunctNotification.java b/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/DefunctNotification.java
index 17fc505..1666c9a 100644
--- a/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/DefunctNotification.java
+++ b/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/DefunctNotification.java
@@ -1,5 +1,6 @@
 package com.sap.tamagotchi.model;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 public class DefunctNotification implements IoTMessage {
@@ -11,6 +12,7 @@ public class DefunctNotification implements IoTMessage {
         this.message = message;
     }
 
+    @JsonIgnore
     @Override
     public String getTopic() {
         return "tamagotchi-defunct";
diff --git a/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/Device.java b/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/Device.java
index 256f3a6..58226ca 100644
--- a/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/Device.java
+++ b/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/Device.java
@@ -61,14 +61,18 @@ public class Device {
 
     @JsonIgnore
     public void changeHealthScore(int delta) {
+        int oldScore = healthScore;
         if (healthScore >= 1) {
             healthScore += delta;
             if (healthScore > 150)
                 healthScore /= 10;
-        } else {
-            healthScore = 0;
         }
-        messages.add(new DeviceEvent(id, owner, color, born, healthScore, Instant.now()));
+
+        if (healthScore < 1) {
+            healthScore = 0;
+            messages.add(new DeviceEvent(id, owner, color, born, healthScore, oldScore, Instant.now()));
+        } else
+            messages.add(new DeviceEvent(id, owner, color, born, healthScore, null, Instant.now()));
     }
 
     @JsonIgnore
diff --git a/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/DeviceEvent.java b/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/DeviceEvent.java
index dccd389..d757795 100644
--- a/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/DeviceEvent.java
+++ b/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/DeviceEvent.java
@@ -1,6 +1,7 @@
 package com.sap.tamagotchi.model;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 import java.time.Instant;
@@ -18,15 +19,18 @@ public class DeviceEvent implements IoTMessage {
     private final Instant born;
     @JsonProperty("healthScore")
     private final Integer healthScore;
+    @JsonProperty("lastHealthScore")
+    private final Integer lastHealthScore;
     @JsonProperty("eventTime")
     private final Instant eventTime;
 
-    public DeviceEvent(String id, String owner, Color color, Instant born, Integer healthScore, Instant eventTime) {
+    public DeviceEvent(String id, String owner, Color color, Instant born, Integer healthScore, Integer lastHealthScore, Instant eventTime) {
         this.id = id;
         this.owner = owner;
         this.color = color;
         this.born = born;
         this.healthScore = healthScore;
+        this.lastHealthScore = lastHealthScore;
         this.eventTime = eventTime;
     }
 
@@ -55,6 +59,12 @@ public class DeviceEvent implements IoTMessage {
         return healthScore;
     }
 
+    @JsonInclude(JsonInclude.Include.NON_NULL)
+    @JsonProperty("lastHealthScore")
+    public Integer getLastHealthScore() {
+        return lastHealthScore;
+    }
+
     @JsonProperty("eventTime")
     public String getEventTime() {
         return eventTime.toString();
diff --git a/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/Owner.java b/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/Owner.java
index b01e7cd..4f97ae8 100644
--- a/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/Owner.java
+++ b/src/tamagotchi-service/src/main/java/com/sap/tamagotchi/model/Owner.java
@@ -49,6 +49,7 @@ public class Owner {
         }
     }
 
+    @Scheduled(fixedDelay = 30000)
     public void killRendomDevice() {
 
         Collection<Device> devices = tamagotchiService.getDevices();